Audiovisual & Video

SRT Subtitle Synchronizer

Correct audio-visual sync drift across .SRT subtitle files in seconds. You can shift timings in batch (adding or subtracting seconds and milliseconds), strip legacy HTML styling tags like font or bold, and renumber indices sequentially so your timeline imports cleanly into video editing software.

100% Private In-Browser Processing

Your files and data are processed strictly in your device's volatile memory. Zero server uploads, no network traffic, and no data is written to disk.

v3.1.4

Time & Limits Configuration

Recommended: 35 to 42 characters for Reels and Shorts

Generated Subtitles

No sentences generated yet. Paste your text and click 'Generate SRT Sentences'.

100% Private In-Browser Processing

Your files and data are processed strictly in your device's volatile memory. Zero server uploads, no network traffic, and no data is written to disk.

v3.1.4

Subtitle Studio

Integrated into Subtitle Studio

If you need to draft captions from scripts or translate dialogue with 1:1 timecode preservation, explore the unified Subtitle Studio.

Want to compose or translate subtitles?

Open Subtitle Studio

Frequently Asked Questions about SRT Synchronization

How do I delay or advance subtitle timestamps in bulk?

Paste or upload your SRT file, define an offset value (positive numbers like +2.5 to delay or negative values like -1.2 to advance), and click apply: the tool recalculates every timecode block across the entire file instantaneously.

Does it support millisecond precision?

Yes, because the tool accepts decimal fractions (such as +0.250s or -0.750s) to align dialogue accurately with audio transients and scene cuts.